Abstract
We fabricated C-doped MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> wires using the <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ex-situ</i> process via the mechanical alloying (MA) technique to improve the doping effect and evaluated the effect of MA and C content on the phase formation, microstructure, and critical properties. The mixtures of MgB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> and 0, 1, and 5 at% carbon black (CB) powders underwent MA using a planetary ball mill system for 25 hours. The powders were loaded into Fe tubes, drawn into wires, and sintered at 1000degC for 1 hour in flowing Ar gas.
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